./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 18:19:09,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 18:19:09,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 18:19:09,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 18:19:09,051 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 18:19:09,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 18:19:09,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 18:19:09,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 18:19:09,054 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 18:19:09,055 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 18:19:09,055 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 18:19:09,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 18:19:09,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 18:19:09,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 18:19:09,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 18:19:09,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 18:19:09,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 18:19:09,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 18:19:09,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 18:19:09,070 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 18:19:09,073 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 18:19:09,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 18:19:09,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 18:19:09,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 18:19:09,079 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 18:19:09,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 18:19:09,083 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 18:19:09,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 18:19:09,084 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 18:19:09,085 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 18:19:09,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 18:19:09,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 18:19:09,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 18:19:09,086 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 18:19:09,087 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 18:19:09,087 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 18:19:09,088 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 18:19:09,088 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 18:19:09,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 18:19:09,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 18:19:09,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 18:19:09,091 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-21 18:19:09,104 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 18:19:09,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 18:19:09,106 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 18:19:09,107 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 18:19:09,107 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 18:19:09,107 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 18:19:09,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 18:19:09,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 18:19:09,108 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 18:19:09,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 18:19:09,109 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 18:19:09,109 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 18:19:09,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 18:19:09,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 18:19:09,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 18:19:09,110 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 18:19:09,110 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 18:19:09,110 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 18:19:09,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 18:19:09,110 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 18:19:09,110 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 18:19:09,111 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 18:19:09,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 18:19:09,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 18:19:09,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 18:19:09,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:19:09,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 18:19:09,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 18:19:09,112 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 18:19:09,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 18:19:09,112 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 18:19:09,112 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 [2021-12-21 18:19:09,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 18:19:09,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 18:19:09,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 18:19:09,305 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 18:19:09,305 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 18:19:09,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2021-12-21 18:19:09,357 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e26c31ab/0e46a205ee81476c8e798a97f6590332/FLAG4e5f74b45 [2021-12-21 18:19:09,741 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 18:19:09,741 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2021-12-21 18:19:09,749 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e26c31ab/0e46a205ee81476c8e798a97f6590332/FLAG4e5f74b45 [2021-12-21 18:19:09,758 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e26c31ab/0e46a205ee81476c8e798a97f6590332 [2021-12-21 18:19:09,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 18:19:09,761 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 18:19:09,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 18:19:09,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 18:19:09,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 18:19:09,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:19:09" (1/1) ... [2021-12-21 18:19:09,765 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@281e94db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:19:09, skipping insertion in model container [2021-12-21 18:19:09,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:19:09" (1/1) ... [2021-12-21 18:19:09,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 18:19:09,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:19:10,025 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2021-12-21 18:19:10,030 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:19:10,041 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 18:19:10,080 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2021-12-21 18:19:10,086 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:19:10,109 INFO L208 MainTranslator]: Completed translation [2021-12-21 18:19:10,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:19:10 WrapperNode [2021-12-21 18:19:10,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 18:19:10,112 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 18:19:10,112 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 18:19:10,112 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 18:19:10,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:19:10" (1/1) ... [2021-12-21 18:19:10,141 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:19:10" (1/1) ... [2021-12-21 18:19:10,163 INFO L137 Inliner]: procedures = 129, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 132 [2021-12-21 18:19:10,163 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 18:19:10,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 18:19:10,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 18:19:10,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 18:19:10,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:19:10" (1/1) ... [2021-12-21 18:19:10,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:19:10" (1/1) ... [2021-12-21 18:19:10,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:19:10" (1/1) ... [2021-12-21 18:19:10,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:19:10" (1/1) ... [2021-12-21 18:19:10,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:19:10" (1/1) ... [2021-12-21 18:19:10,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:19:10" (1/1) ... [2021-12-21 18:19:10,197 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:19:10" (1/1) ... [2021-12-21 18:19:10,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 18:19:10,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 18:19:10,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 18:19:10,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 18:19:10,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:19:10" (1/1) ... [2021-12-21 18:19:10,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:19:10,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:19:10,234 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 18:19:10,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 18:19:10,260 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-12-21 18:19:10,260 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-12-21 18:19:10,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 18:19:10,260 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2021-12-21 18:19:10,260 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2021-12-21 18:19:10,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 18:19:10,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 18:19:10,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 18:19:10,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 18:19:10,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 18:19:10,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 18:19:10,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 18:19:10,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 18:19:10,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 18:19:10,360 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 18:19:10,380 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 18:19:10,417 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-12-21 18:19:10,580 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 18:19:10,584 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 18:19:10,585 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-21 18:19:10,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:19:10 BoogieIcfgContainer [2021-12-21 18:19:10,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 18:19:10,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 18:19:10,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 18:19:10,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 18:19:10,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 06:19:09" (1/3) ... [2021-12-21 18:19:10,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ac9316c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:19:10, skipping insertion in model container [2021-12-21 18:19:10,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:19:10" (2/3) ... [2021-12-21 18:19:10,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ac9316c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:19:10, skipping insertion in model container [2021-12-21 18:19:10,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:19:10" (3/3) ... [2021-12-21 18:19:10,596 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-2.i [2021-12-21 18:19:10,599 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 18:19:10,599 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2021-12-21 18:19:10,638 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 18:19:10,643 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 18:19:10,643 INFO L340 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2021-12-21 18:19:10,656 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 80 states have internal predecessors, (96), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:19:10,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 18:19:10,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:10,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:10,673 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:10,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:10,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1721266506, now seen corresponding path program 1 times [2021-12-21 18:19:10,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:10,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440400954] [2021-12-21 18:19:10,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:10,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:10,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:10,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:10,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:19:10,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:10,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440400954] [2021-12-21 18:19:10,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440400954] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:19:10,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:19:10,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:19:10,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744553086] [2021-12-21 18:19:10,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:19:10,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 18:19:10,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:10,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 18:19:10,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 18:19:10,846 INFO L87 Difference]: Start difference. First operand has 86 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 80 states have internal predecessors, (96), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:19:10,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:10,862 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2021-12-21 18:19:10,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 18:19:10,875 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-21 18:19:10,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:10,880 INFO L225 Difference]: With dead ends: 86 [2021-12-21 18:19:10,883 INFO L226 Difference]: Without dead ends: 80 [2021-12-21 18:19:10,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 18:19:10,888 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:10,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:19:10,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-21 18:19:10,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-12-21 18:19:10,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 75 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:19:10,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2021-12-21 18:19:10,922 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 13 [2021-12-21 18:19:10,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:10,923 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2021-12-21 18:19:10,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:19:10,923 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2021-12-21 18:19:10,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-21 18:19:10,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:10,925 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:10,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 18:19:10,926 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:10,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:10,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1583427249, now seen corresponding path program 1 times [2021-12-21 18:19:10,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:10,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205165805] [2021-12-21 18:19:10,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:10,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:10,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:19:10,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:10,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205165805] [2021-12-21 18:19:10,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205165805] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:19:10,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:19:10,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:19:10,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634007603] [2021-12-21 18:19:10,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:19:10,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:19:10,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:10,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:19:10,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:19:10,994 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:19:11,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:11,066 INFO L93 Difference]: Finished difference Result 141 states and 158 transitions. [2021-12-21 18:19:11,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:19:11,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-21 18:19:11,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:11,068 INFO L225 Difference]: With dead ends: 141 [2021-12-21 18:19:11,069 INFO L226 Difference]: Without dead ends: 141 [2021-12-21 18:19:11,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:19:11,071 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 65 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:11,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 162 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:19:11,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-21 18:19:11,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 79. [2021-12-21 18:19:11,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 51 states have (on average 1.607843137254902) internal successors, (82), 74 states have internal predecessors, (82), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:19:11,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2021-12-21 18:19:11,089 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 15 [2021-12-21 18:19:11,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:11,090 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2021-12-21 18:19:11,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:19:11,091 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2021-12-21 18:19:11,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-21 18:19:11,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:11,092 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:11,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 18:19:11,093 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:11,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:11,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1583427248, now seen corresponding path program 1 times [2021-12-21 18:19:11,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:11,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757712227] [2021-12-21 18:19:11,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:11,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:11,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:11,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:19:11,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:11,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757712227] [2021-12-21 18:19:11,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757712227] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:19:11,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:19:11,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:19:11,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207853924] [2021-12-21 18:19:11,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:19:11,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:19:11,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:11,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:19:11,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:19:11,167 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:19:11,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:11,220 INFO L93 Difference]: Finished difference Result 142 states and 158 transitions. [2021-12-21 18:19:11,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:19:11,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-21 18:19:11,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:11,222 INFO L225 Difference]: With dead ends: 142 [2021-12-21 18:19:11,222 INFO L226 Difference]: Without dead ends: 142 [2021-12-21 18:19:11,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:19:11,223 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 67 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:11,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 197 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:19:11,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-21 18:19:11,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 78. [2021-12-21 18:19:11,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 51 states have (on average 1.588235294117647) internal successors, (81), 73 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:19:11,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2021-12-21 18:19:11,229 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 15 [2021-12-21 18:19:11,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:11,230 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2021-12-21 18:19:11,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:19:11,230 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2021-12-21 18:19:11,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-21 18:19:11,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:11,231 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:11,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 18:19:11,231 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:11,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:11,232 INFO L85 PathProgramCache]: Analyzing trace with hash 840693873, now seen corresponding path program 1 times [2021-12-21 18:19:11,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:11,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49416632] [2021-12-21 18:19:11,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:11,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:11,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:11,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 18:19:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:19:11,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:11,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49416632] [2021-12-21 18:19:11,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49416632] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:19:11,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934814419] [2021-12-21 18:19:11,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:11,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:11,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:19:11,343 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:19:11,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 18:19:11,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:11,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 18:19:11,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:19:11,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:19:11,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:19:11,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934814419] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:19:11,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:19:11,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-21 18:19:11,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616853289] [2021-12-21 18:19:11,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:19:11,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 18:19:11,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:11,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 18:19:11,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-21 18:19:11,544 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:19:11,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:11,591 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2021-12-21 18:19:11,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:19:11,591 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-12-21 18:19:11,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:11,592 INFO L225 Difference]: With dead ends: 80 [2021-12-21 18:19:11,592 INFO L226 Difference]: Without dead ends: 80 [2021-12-21 18:19:11,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-21 18:19:11,593 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 3 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:11,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 453 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:19:11,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-21 18:19:11,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-12-21 18:19:11,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 53 states have (on average 1.5660377358490567) internal successors, (83), 75 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:19:11,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2021-12-21 18:19:11,599 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 26 [2021-12-21 18:19:11,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:11,599 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2021-12-21 18:19:11,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:19:11,599 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2021-12-21 18:19:11,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-21 18:19:11,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:11,600 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:11,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 18:19:11,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:11,817 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:11,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:11,818 INFO L85 PathProgramCache]: Analyzing trace with hash -838491758, now seen corresponding path program 1 times [2021-12-21 18:19:11,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:11,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095718311] [2021-12-21 18:19:11,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:11,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:11,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:11,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 18:19:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:19:11,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:11,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095718311] [2021-12-21 18:19:11,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095718311] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:19:11,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454442567] [2021-12-21 18:19:11,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:11,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:11,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:19:11,954 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:19:11,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 18:19:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:12,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 18:19:12,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:19:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:19:12,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:19:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:19:12,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454442567] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:19:12,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:19:12,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2021-12-21 18:19:12,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018661045] [2021-12-21 18:19:12,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:19:12,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 18:19:12,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:12,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 18:19:12,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-12-21 18:19:12,237 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 18:19:12,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:12,451 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2021-12-21 18:19:12,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 18:19:12,452 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2021-12-21 18:19:12,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:12,453 INFO L225 Difference]: With dead ends: 103 [2021-12-21 18:19:12,453 INFO L226 Difference]: Without dead ends: 103 [2021-12-21 18:19:12,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-12-21 18:19:12,454 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 25 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:12,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 930 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:19:12,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-21 18:19:12,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2021-12-21 18:19:12,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 80 states have internal predecessors, (88), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:19:12,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2021-12-21 18:19:12,459 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 31 [2021-12-21 18:19:12,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:12,459 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2021-12-21 18:19:12,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 18:19:12,460 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2021-12-21 18:19:12,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-21 18:19:12,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:12,461 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:12,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 18:19:12,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:12,677 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:12,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:12,677 INFO L85 PathProgramCache]: Analyzing trace with hash -686979823, now seen corresponding path program 2 times [2021-12-21 18:19:12,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:12,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90998283] [2021-12-21 18:19:12,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:12,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:12,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:12,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:19:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:12,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 18:19:12,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:12,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90998283] [2021-12-21 18:19:12,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90998283] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:19:12,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580849342] [2021-12-21 18:19:12,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:19:12,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:12,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:19:12,820 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:19:12,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 18:19:12,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:19:12,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:19:12,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 18:19:12,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:19:12,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:19:12,936 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:19:12,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-21 18:19:12,958 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:19:12,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-21 18:19:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 18:19:13,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:19:13,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580849342] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:19:13,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:19:13,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-21 18:19:13,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910356986] [2021-12-21 18:19:13,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:19:13,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:19:13,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:13,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:19:13,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:19:13,018 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:19:13,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:13,045 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2021-12-21 18:19:13,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:19:13,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2021-12-21 18:19:13,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:13,046 INFO L225 Difference]: With dead ends: 102 [2021-12-21 18:19:13,046 INFO L226 Difference]: Without dead ends: 102 [2021-12-21 18:19:13,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:19:13,047 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 65 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:13,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 111 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2021-12-21 18:19:13,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-21 18:19:13,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 90. [2021-12-21 18:19:13,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 64 states have (on average 1.46875) internal successors, (94), 84 states have internal predecessors, (94), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:19:13,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2021-12-21 18:19:13,063 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 36 [2021-12-21 18:19:13,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:13,064 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2021-12-21 18:19:13,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:19:13,064 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2021-12-21 18:19:13,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-21 18:19:13,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:13,066 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:13,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 18:19:13,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:13,282 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:13,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:13,282 INFO L85 PathProgramCache]: Analyzing trace with hash -686979822, now seen corresponding path program 1 times [2021-12-21 18:19:13,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:13,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396312980] [2021-12-21 18:19:13,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:13,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:13,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:13,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:13,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:19:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 18:19:13,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:13,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396312980] [2021-12-21 18:19:13,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396312980] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:19:13,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181215642] [2021-12-21 18:19:13,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:13,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:13,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:19:13,353 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:19:13,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 18:19:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:13,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-21 18:19:13,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:19:13,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:19:13,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:19:13,464 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:19:13,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-21 18:19:13,479 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:19:13,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 18:19:13,539 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:19:13,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-21 18:19:13,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 18:19:13,666 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:19:13,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2021-12-21 18:19:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:19:13,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:19:13,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-21 18:19:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 18:19:14,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181215642] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:19:14,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:19:14,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10, 9] total 19 [2021-12-21 18:19:14,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999878187] [2021-12-21 18:19:14,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:19:14,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 18:19:14,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:14,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 18:19:14,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-12-21 18:19:14,092 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 20 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 20 states have internal predecessors, (63), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:19:14,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:14,331 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2021-12-21 18:19:14,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 18:19:14,332 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 20 states have internal predecessors, (63), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-12-21 18:19:14,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:14,332 INFO L225 Difference]: With dead ends: 100 [2021-12-21 18:19:14,332 INFO L226 Difference]: Without dead ends: 100 [2021-12-21 18:19:14,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-12-21 18:19:14,333 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 369 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:14,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 426 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 226 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2021-12-21 18:19:14,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-21 18:19:14,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 88. [2021-12-21 18:19:14,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.4375) internal successors, (92), 82 states have internal predecessors, (92), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:19:14,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2021-12-21 18:19:14,336 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 36 [2021-12-21 18:19:14,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:14,337 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2021-12-21 18:19:14,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 20 states have internal predecessors, (63), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:19:14,337 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2021-12-21 18:19:14,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-21 18:19:14,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:14,337 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:14,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 18:19:14,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:14,538 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:14,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:14,538 INFO L85 PathProgramCache]: Analyzing trace with hash -296648915, now seen corresponding path program 1 times [2021-12-21 18:19:14,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:14,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017179725] [2021-12-21 18:19:14,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:14,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:14,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:14,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:19:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 18:19:14,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:14,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017179725] [2021-12-21 18:19:14,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017179725] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:19:14,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:19:14,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 18:19:14,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145284636] [2021-12-21 18:19:14,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:19:14,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:19:14,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:14,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:19:14,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:19:14,602 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:19:14,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:14,748 INFO L93 Difference]: Finished difference Result 166 states and 184 transitions. [2021-12-21 18:19:14,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 18:19:14,748 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2021-12-21 18:19:14,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:14,749 INFO L225 Difference]: With dead ends: 166 [2021-12-21 18:19:14,749 INFO L226 Difference]: Without dead ends: 166 [2021-12-21 18:19:14,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-21 18:19:14,751 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 468 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:14,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 264 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:19:14,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-21 18:19:14,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 93. [2021-12-21 18:19:14,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.4492753623188406) internal successors, (100), 87 states have internal predecessors, (100), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:19:14,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2021-12-21 18:19:14,761 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 39 [2021-12-21 18:19:14,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:14,761 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2021-12-21 18:19:14,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:19:14,761 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2021-12-21 18:19:14,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-21 18:19:14,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:14,763 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:14,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 18:19:14,764 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:14,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:14,764 INFO L85 PathProgramCache]: Analyzing trace with hash -296648914, now seen corresponding path program 1 times [2021-12-21 18:19:14,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:14,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856342948] [2021-12-21 18:19:14,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:14,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:14,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:14,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:14,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:19:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 18:19:14,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:14,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856342948] [2021-12-21 18:19:14,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856342948] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:19:14,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:19:14,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 18:19:14,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215591343] [2021-12-21 18:19:14,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:19:14,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:19:14,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:14,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:19:14,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:19:14,846 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:19:15,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:15,032 INFO L93 Difference]: Finished difference Result 156 states and 172 transitions. [2021-12-21 18:19:15,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 18:19:15,033 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2021-12-21 18:19:15,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:15,033 INFO L225 Difference]: With dead ends: 156 [2021-12-21 18:19:15,033 INFO L226 Difference]: Without dead ends: 156 [2021-12-21 18:19:15,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-21 18:19:15,034 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 488 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:15,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 248 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:19:15,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-21 18:19:15,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 93. [2021-12-21 18:19:15,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.434782608695652) internal successors, (99), 87 states have internal predecessors, (99), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:19:15,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2021-12-21 18:19:15,037 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 39 [2021-12-21 18:19:15,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:15,037 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2021-12-21 18:19:15,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:19:15,037 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2021-12-21 18:19:15,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-21 18:19:15,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:15,037 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:15,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 18:19:15,038 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:15,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:15,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1573341240, now seen corresponding path program 1 times [2021-12-21 18:19:15,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:15,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522142813] [2021-12-21 18:19:15,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:15,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:15,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:15,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:15,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:19:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 18:19:15,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:15,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522142813] [2021-12-21 18:19:15,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522142813] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:19:15,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:19:15,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 18:19:15,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799115791] [2021-12-21 18:19:15,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:19:15,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:19:15,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:15,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:19:15,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:19:15,087 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:19:15,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:15,175 INFO L93 Difference]: Finished difference Result 135 states and 150 transitions. [2021-12-21 18:19:15,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 18:19:15,176 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2021-12-21 18:19:15,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:15,176 INFO L225 Difference]: With dead ends: 135 [2021-12-21 18:19:15,176 INFO L226 Difference]: Without dead ends: 135 [2021-12-21 18:19:15,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-12-21 18:19:15,177 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 390 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:15,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 318 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:19:15,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-21 18:19:15,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 93. [2021-12-21 18:19:15,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.4202898550724639) internal successors, (98), 87 states have internal predecessors, (98), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:19:15,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2021-12-21 18:19:15,180 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 42 [2021-12-21 18:19:15,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:15,180 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2021-12-21 18:19:15,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:19:15,181 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2021-12-21 18:19:15,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-21 18:19:15,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:15,181 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:15,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 18:19:15,182 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:15,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:15,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1574973534, now seen corresponding path program 1 times [2021-12-21 18:19:15,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:15,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987788059] [2021-12-21 18:19:15,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:15,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:15,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:15,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:19:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 18:19:15,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:15,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987788059] [2021-12-21 18:19:15,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987788059] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:19:15,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977391764] [2021-12-21 18:19:15,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:15,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:15,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:19:15,275 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:19:15,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 18:19:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:15,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-21 18:19:15,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:19:15,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:19:15,373 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:19:15,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-21 18:19:15,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 18:19:15,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:19:15,665 INFO L353 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-21 18:19:15,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-12-21 18:19:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:19:15,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:19:15,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-12-21 18:19:15,814 INFO L353 Elim1Store]: treesize reduction 11, result has 64.5 percent of original size [2021-12-21 18:19:15,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 107 [2021-12-21 18:19:15,964 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 18:19:15,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977391764] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:19:15,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:19:15,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 25 [2021-12-21 18:19:15,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494494767] [2021-12-21 18:19:15,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:19:15,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-21 18:19:15,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:15,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-21 18:19:15,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-12-21 18:19:15,966 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand has 26 states, 25 states have (on average 2.6) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:19:16,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:16,261 INFO L93 Difference]: Finished difference Result 137 states and 152 transitions. [2021-12-21 18:19:16,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 18:19:16,261 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.6) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2021-12-21 18:19:16,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:16,262 INFO L225 Difference]: With dead ends: 137 [2021-12-21 18:19:16,262 INFO L226 Difference]: Without dead ends: 137 [2021-12-21 18:19:16,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2021-12-21 18:19:16,263 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 112 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:16,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 880 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 416 Invalid, 0 Unknown, 235 Unchecked, 0.2s Time] [2021-12-21 18:19:16,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-21 18:19:16,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 96. [2021-12-21 18:19:16,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 90 states have internal predecessors, (103), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:19:16,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2021-12-21 18:19:16,266 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 42 [2021-12-21 18:19:16,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:16,266 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2021-12-21 18:19:16,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.6) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:19:16,266 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2021-12-21 18:19:16,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-21 18:19:16,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:16,266 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:16,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-21 18:19:16,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-21 18:19:16,478 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:16,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:16,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1574973535, now seen corresponding path program 1 times [2021-12-21 18:19:16,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:16,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247191804] [2021-12-21 18:19:16,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:16,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:16,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:16,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:19:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 18:19:16,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:16,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247191804] [2021-12-21 18:19:16,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247191804] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:19:16,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171490691] [2021-12-21 18:19:16,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:16,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:16,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:19:16,642 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:19:16,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 18:19:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:16,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-21 18:19:16,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:19:16,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:19:16,820 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:19:16,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-21 18:19:16,836 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:19:16,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 18:19:16,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 18:19:16,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 18:19:17,294 INFO L353 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-12-21 18:19:17,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 54 [2021-12-21 18:19:17,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:19:17,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:19:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:19:17,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:19:17,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171490691] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:19:17,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:19:17,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-12-21 18:19:17,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93647719] [2021-12-21 18:19:17,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:19:17,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-21 18:19:17,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:17,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-21 18:19:17,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=915, Unknown=0, NotChecked=0, Total=992 [2021-12-21 18:19:17,692 INFO L87 Difference]: Start difference. First operand 96 states and 109 transitions. Second operand has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 27 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:19:18,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:18,497 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2021-12-21 18:19:18,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 18:19:18,497 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 27 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2021-12-21 18:19:18,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:18,498 INFO L225 Difference]: With dead ends: 116 [2021-12-21 18:19:18,498 INFO L226 Difference]: Without dead ends: 116 [2021-12-21 18:19:18,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=230, Invalid=1750, Unknown=0, NotChecked=0, Total=1980 [2021-12-21 18:19:18,499 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 78 mSDsluCounter, 1249 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1324 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:18,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 1324 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 586 Invalid, 0 Unknown, 135 Unchecked, 0.3s Time] [2021-12-21 18:19:18,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-21 18:19:18,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 96. [2021-12-21 18:19:18,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 90 states have internal predecessors, (102), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:19:18,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2021-12-21 18:19:18,501 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 42 [2021-12-21 18:19:18,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:18,501 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2021-12-21 18:19:18,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 27 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:19:18,502 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2021-12-21 18:19:18,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 18:19:18,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:18,502 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:18,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 18:19:18,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:18,703 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:18,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:18,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1812282727, now seen corresponding path program 1 times [2021-12-21 18:19:18,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:18,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155215153] [2021-12-21 18:19:18,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:18,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:18,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:18,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:19:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 18:19:18,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:18,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155215153] [2021-12-21 18:19:18,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155215153] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:19:18,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159509263] [2021-12-21 18:19:18,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:18,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:18,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:19:18,804 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:19:18,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 18:19:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:18,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-21 18:19:18,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:19:18,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 18:19:19,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:19:19,149 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Unexpected substitution problem. [2021-12-21 18:19:19,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:19:19,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-12-21 18:19:19,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185114174] [2021-12-21 18:19:19,149 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 18:19:19,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 18:19:19,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:19,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 18:19:19,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-12-21 18:19:19,150 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:19:19,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:19,414 INFO L93 Difference]: Finished difference Result 143 states and 157 transitions. [2021-12-21 18:19:19,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 18:19:19,415 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-21 18:19:19,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:19,415 INFO L225 Difference]: With dead ends: 143 [2021-12-21 18:19:19,415 INFO L226 Difference]: Without dead ends: 143 [2021-12-21 18:19:19,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-12-21 18:19:19,416 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 458 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:19,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 627 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:19:19,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-21 18:19:19,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 96. [2021-12-21 18:19:19,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 72 states have (on average 1.4027777777777777) internal successors, (101), 90 states have internal predecessors, (101), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:19:19,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2021-12-21 18:19:19,419 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 45 [2021-12-21 18:19:19,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:19,419 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2021-12-21 18:19:19,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:19:19,419 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2021-12-21 18:19:19,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 18:19:19,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:19,419 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:19,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 18:19:19,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:19,620 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:19,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:19,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1813915021, now seen corresponding path program 2 times [2021-12-21 18:19:19,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:19,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348939749] [2021-12-21 18:19:19,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:19,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:19,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:19,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:19,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:19:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 18:19:19,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:19,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348939749] [2021-12-21 18:19:19,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348939749] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:19:19,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756749060] [2021-12-21 18:19:19,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:19:19,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:19,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:19:19,829 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:19:19,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 18:19:19,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:19:19,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:19:19,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-21 18:19:19,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:19:19,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:19:19,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 18:19:19,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 18:19:20,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:19:20,033 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:19:20,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 18:19:20,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-21 18:19:20,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-21 18:19:20,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-21 18:19:20,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:19:20,834 INFO L353 Elim1Store]: treesize reduction 76, result has 26.9 percent of original size [2021-12-21 18:19:20,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 79 [2021-12-21 18:19:20,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:19:20,844 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-21 18:19:20,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 28 [2021-12-21 18:19:20,855 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:19:20,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:19:21,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756749060] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:19:21,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:19:21,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 29 [2021-12-21 18:19:21,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870090854] [2021-12-21 18:19:21,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:19:21,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-21 18:19:21,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:21,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-21 18:19:21,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=919, Unknown=0, NotChecked=0, Total=992 [2021-12-21 18:19:21,150 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:19:21,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:21,777 INFO L93 Difference]: Finished difference Result 141 states and 158 transitions. [2021-12-21 18:19:21,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 18:19:21,778 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2021-12-21 18:19:21,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:21,778 INFO L225 Difference]: With dead ends: 141 [2021-12-21 18:19:21,778 INFO L226 Difference]: Without dead ends: 141 [2021-12-21 18:19:21,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=159, Invalid=1647, Unknown=0, NotChecked=0, Total=1806 [2021-12-21 18:19:21,779 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 82 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:21,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 1522 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 502 Invalid, 0 Unknown, 133 Unchecked, 0.2s Time] [2021-12-21 18:19:21,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-21 18:19:21,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 122. [2021-12-21 18:19:21,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 96 states have (on average 1.34375) internal successors, (129), 114 states have internal predecessors, (129), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:19:21,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 137 transitions. [2021-12-21 18:19:21,787 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 137 transitions. Word has length 45 [2021-12-21 18:19:21,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:21,787 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 137 transitions. [2021-12-21 18:19:21,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:19:21,787 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 137 transitions. [2021-12-21 18:19:21,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-21 18:19:21,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:21,787 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:21,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 18:19:21,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-21 18:19:21,988 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:21,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:21,989 INFO L85 PathProgramCache]: Analyzing trace with hash -285859641, now seen corresponding path program 1 times [2021-12-21 18:19:21,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:21,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913508586] [2021-12-21 18:19:21,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:21,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:22,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:22,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:22,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:19:22,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:22,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-21 18:19:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 18:19:22,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:22,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913508586] [2021-12-21 18:19:22,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913508586] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:19:22,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150672262] [2021-12-21 18:19:22,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:22,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:22,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:19:22,070 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:19:22,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 18:19:22,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:22,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 18:19:22,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:19:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 18:19:22,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:19:22,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150672262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:19:22,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:19:22,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-12-21 18:19:22,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114591851] [2021-12-21 18:19:22,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:19:22,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:19:22,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:22,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:19:22,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:19:22,222 INFO L87 Difference]: Start difference. First operand 122 states and 137 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:19:22,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:22,260 INFO L93 Difference]: Finished difference Result 186 states and 209 transitions. [2021-12-21 18:19:22,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:19:22,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2021-12-21 18:19:22,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:22,262 INFO L225 Difference]: With dead ends: 186 [2021-12-21 18:19:22,262 INFO L226 Difference]: Without dead ends: 186 [2021-12-21 18:19:22,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-21 18:19:22,262 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 33 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:22,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 354 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:19:22,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-21 18:19:22,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 138. [2021-12-21 18:19:22,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 110 states have (on average 1.3363636363636364) internal successors, (147), 128 states have internal predecessors, (147), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-21 18:19:22,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 157 transitions. [2021-12-21 18:19:22,265 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 157 transitions. Word has length 47 [2021-12-21 18:19:22,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:22,266 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 157 transitions. [2021-12-21 18:19:22,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:19:22,266 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 157 transitions. [2021-12-21 18:19:22,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-21 18:19:22,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:22,266 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:22,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 18:19:22,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-21 18:19:22,479 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:22,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:22,480 INFO L85 PathProgramCache]: Analyzing trace with hash -937654824, now seen corresponding path program 2 times [2021-12-21 18:19:22,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:22,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375204171] [2021-12-21 18:19:22,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:22,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:22,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:22,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:19:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 18:19:22,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:22,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375204171] [2021-12-21 18:19:22,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375204171] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:19:22,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011926469] [2021-12-21 18:19:22,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:19:22,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:22,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:19:22,662 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:19:22,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 18:19:22,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:19:22,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:19:22,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-21 18:19:22,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:19:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 18:19:22,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:19:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 18:19:23,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011926469] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:19:23,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:19:23,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 26 [2021-12-21 18:19:23,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340734946] [2021-12-21 18:19:23,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:19:23,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-21 18:19:23,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:23,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-21 18:19:23,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-12-21 18:19:23,165 INFO L87 Difference]: Start difference. First operand 138 states and 157 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 18:19:23,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:23,472 INFO L93 Difference]: Finished difference Result 318 states and 360 transitions. [2021-12-21 18:19:23,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 18:19:23,472 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2021-12-21 18:19:23,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:23,473 INFO L225 Difference]: With dead ends: 318 [2021-12-21 18:19:23,473 INFO L226 Difference]: Without dead ends: 318 [2021-12-21 18:19:23,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 81 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2021-12-21 18:19:23,474 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 166 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1691 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:23,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 1691 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:19:23,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-12-21 18:19:23,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 193. [2021-12-21 18:19:23,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 162 states have (on average 1.2592592592592593) internal successors, (204), 180 states have internal predecessors, (204), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-21 18:19:23,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 222 transitions. [2021-12-21 18:19:23,479 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 222 transitions. Word has length 48 [2021-12-21 18:19:23,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:23,479 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 222 transitions. [2021-12-21 18:19:23,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 18:19:23,479 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 222 transitions. [2021-12-21 18:19:23,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-21 18:19:23,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:23,480 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:23,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 18:19:23,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-21 18:19:23,697 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:23,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:23,697 INFO L85 PathProgramCache]: Analyzing trace with hash -66371861, now seen corresponding path program 1 times [2021-12-21 18:19:23,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:23,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632478322] [2021-12-21 18:19:23,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:23,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:23,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:23,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:23,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:19:23,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:23,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 18:19:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 18:19:23,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:23,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632478322] [2021-12-21 18:19:23,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632478322] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:19:23,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019294510] [2021-12-21 18:19:23,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:23,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:23,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:19:23,805 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:19:23,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 18:19:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:23,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 18:19:23,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:19:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 18:19:24,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:19:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 18:19:24,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019294510] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:19:24,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:19:24,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2021-12-21 18:19:24,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622077480] [2021-12-21 18:19:24,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:19:24,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-21 18:19:24,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:24,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-21 18:19:24,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-12-21 18:19:24,318 INFO L87 Difference]: Start difference. First operand 193 states and 222 transitions. Second operand has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 22 states have internal predecessors, (83), 4 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-21 18:19:24,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:24,727 INFO L93 Difference]: Finished difference Result 299 states and 349 transitions. [2021-12-21 18:19:24,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 18:19:24,727 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 22 states have internal predecessors, (83), 4 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2021-12-21 18:19:24,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:24,728 INFO L225 Difference]: With dead ends: 299 [2021-12-21 18:19:24,728 INFO L226 Difference]: Without dead ends: 299 [2021-12-21 18:19:24,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2021-12-21 18:19:24,729 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 146 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1280 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:24,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 1280 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:19:24,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-12-21 18:19:24,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 217. [2021-12-21 18:19:24,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 183 states have (on average 1.284153005464481) internal successors, (235), 203 states have internal predecessors, (235), 6 states have call successors, (6), 4 states have call predecessors, (6), 9 states have return successors, (14), 9 states have call predecessors, (14), 6 states have call successors, (14) [2021-12-21 18:19:24,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 255 transitions. [2021-12-21 18:19:24,745 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 255 transitions. Word has length 50 [2021-12-21 18:19:24,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:24,745 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 255 transitions. [2021-12-21 18:19:24,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 22 states have internal predecessors, (83), 4 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-21 18:19:24,745 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 255 transitions. [2021-12-21 18:19:24,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-21 18:19:24,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:24,746 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:24,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 18:19:24,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-21 18:19:24,953 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:24,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:24,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1755315603, now seen corresponding path program 1 times [2021-12-21 18:19:24,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:24,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059291901] [2021-12-21 18:19:24,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:24,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:25,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:25,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:19:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:25,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 18:19:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 18:19:25,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:25,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059291901] [2021-12-21 18:19:25,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059291901] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:19:25,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478401395] [2021-12-21 18:19:25,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:25,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:25,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:19:25,056 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:19:25,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 18:19:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:25,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-21 18:19:25,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:19:25,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:19:25,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:19:25,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2021-12-21 18:19:25,235 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:19:25,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-21 18:19:25,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 18:19:25,357 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:19:25,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-12-21 18:19:25,436 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:19:25,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-21 18:19:25,445 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 18:19:25,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:19:25,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-21 18:19:25,701 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 18:19:25,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478401395] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:19:25,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:19:25,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2021-12-21 18:19:25,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822852270] [2021-12-21 18:19:25,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:19:25,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-21 18:19:25,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:25,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-21 18:19:25,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-12-21 18:19:25,703 INFO L87 Difference]: Start difference. First operand 217 states and 255 transitions. Second operand has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 22 states have internal predecessors, (61), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 18:19:26,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:26,017 INFO L93 Difference]: Finished difference Result 258 states and 302 transitions. [2021-12-21 18:19:26,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 18:19:26,018 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 22 states have internal predecessors, (61), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2021-12-21 18:19:26,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:26,019 INFO L225 Difference]: With dead ends: 258 [2021-12-21 18:19:26,019 INFO L226 Difference]: Without dead ends: 258 [2021-12-21 18:19:26,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 91 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2021-12-21 18:19:26,020 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 234 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:26,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 811 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 396 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2021-12-21 18:19:26,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-21 18:19:26,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 212. [2021-12-21 18:19:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 180 states have (on average 1.2666666666666666) internal successors, (228), 198 states have internal predecessors, (228), 6 states have call successors, (6), 4 states have call predecessors, (6), 9 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) [2021-12-21 18:19:26,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 247 transitions. [2021-12-21 18:19:26,030 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 247 transitions. Word has length 50 [2021-12-21 18:19:26,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:26,030 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 247 transitions. [2021-12-21 18:19:26,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 22 states have internal predecessors, (61), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 18:19:26,031 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 247 transitions. [2021-12-21 18:19:26,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-21 18:19:26,031 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:26,031 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:26,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 18:19:26,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-21 18:19:26,239 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:26,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:26,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1755315602, now seen corresponding path program 1 times [2021-12-21 18:19:26,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:26,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905765768] [2021-12-21 18:19:26,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:26,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:26,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:26,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:19:26,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:26,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 18:19:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 18:19:26,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:26,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905765768] [2021-12-21 18:19:26,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905765768] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:19:26,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424559697] [2021-12-21 18:19:26,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:26,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:26,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:19:26,440 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:19:26,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 18:19:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:26,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 18:19:26,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:19:26,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:19:26,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:19:26,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-21 18:19:26,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:19:26,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-21 18:19:26,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:19:26,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-21 18:19:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 18:19:26,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:19:26,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424559697] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:19:26,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:19:26,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 11 [2021-12-21 18:19:26,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292415861] [2021-12-21 18:19:26,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:19:26,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:19:26,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:26,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:19:26,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-12-21 18:19:26,811 INFO L87 Difference]: Start difference. First operand 212 states and 247 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:19:26,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:26,863 INFO L93 Difference]: Finished difference Result 295 states and 339 transitions. [2021-12-21 18:19:26,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:19:26,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2021-12-21 18:19:26,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:26,864 INFO L225 Difference]: With dead ends: 295 [2021-12-21 18:19:26,864 INFO L226 Difference]: Without dead ends: 295 [2021-12-21 18:19:26,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-12-21 18:19:26,865 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 115 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:26,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 213 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 44 Unchecked, 0.0s Time] [2021-12-21 18:19:26,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-12-21 18:19:26,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 232. [2021-12-21 18:19:26,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 198 states have (on average 1.2828282828282829) internal successors, (254), 216 states have internal predecessors, (254), 7 states have call successors, (7), 5 states have call predecessors, (7), 10 states have return successors, (14), 10 states have call predecessors, (14), 7 states have call successors, (14) [2021-12-21 18:19:26,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 275 transitions. [2021-12-21 18:19:26,873 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 275 transitions. Word has length 50 [2021-12-21 18:19:26,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:26,873 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 275 transitions. [2021-12-21 18:19:26,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:19:26,874 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 275 transitions. [2021-12-21 18:19:26,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-21 18:19:26,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:26,875 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:26,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-21 18:19:27,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:27,091 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:27,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:27,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1074364724, now seen corresponding path program 3 times [2021-12-21 18:19:27,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:27,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071927113] [2021-12-21 18:19:27,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:27,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:27,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:27,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:27,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:27,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 18:19:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:27,157 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 18:19:27,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:27,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071927113] [2021-12-21 18:19:27,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071927113] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:19:27,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766285678] [2021-12-21 18:19:27,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 18:19:27,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:27,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:19:27,158 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:19:27,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 18:19:27,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-21 18:19:27,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:19:27,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 18:19:27,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:19:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 18:19:27,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:19:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 18:19:27,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766285678] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:19:27,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:19:27,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 16 [2021-12-21 18:19:27,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241300381] [2021-12-21 18:19:27,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:19:27,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 18:19:27,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:27,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 18:19:27,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-12-21 18:19:27,434 INFO L87 Difference]: Start difference. First operand 232 states and 275 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 18:19:27,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:27,583 INFO L93 Difference]: Finished difference Result 301 states and 358 transitions. [2021-12-21 18:19:27,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 18:19:27,583 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2021-12-21 18:19:27,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:27,584 INFO L225 Difference]: With dead ends: 301 [2021-12-21 18:19:27,584 INFO L226 Difference]: Without dead ends: 301 [2021-12-21 18:19:27,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-12-21 18:19:27,585 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 78 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:27,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 987 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:19:27,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-12-21 18:19:27,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 206. [2021-12-21 18:19:27,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 174 states have (on average 1.2873563218390804) internal successors, (224), 191 states have internal predecessors, (224), 6 states have call successors, (6), 5 states have call predecessors, (6), 9 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2021-12-21 18:19:27,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 241 transitions. [2021-12-21 18:19:27,589 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 241 transitions. Word has length 50 [2021-12-21 18:19:27,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:27,589 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 241 transitions. [2021-12-21 18:19:27,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 18:19:27,589 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 241 transitions. [2021-12-21 18:19:27,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-21 18:19:27,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:27,590 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:27,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-21 18:19:27,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:27,807 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:27,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:27,807 INFO L85 PathProgramCache]: Analyzing trace with hash 793594527, now seen corresponding path program 1 times [2021-12-21 18:19:27,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:27,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822540134] [2021-12-21 18:19:27,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:27,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:27,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:27,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:19:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:27,849 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 18:19:27,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:27,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822540134] [2021-12-21 18:19:27,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822540134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:19:27,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:19:27,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 18:19:27,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254290727] [2021-12-21 18:19:27,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:19:27,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:19:27,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:27,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:19:27,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:19:27,851 INFO L87 Difference]: Start difference. First operand 206 states and 241 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:19:27,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:27,987 INFO L93 Difference]: Finished difference Result 242 states and 276 transitions. [2021-12-21 18:19:27,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 18:19:27,987 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2021-12-21 18:19:27,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:27,988 INFO L225 Difference]: With dead ends: 242 [2021-12-21 18:19:27,988 INFO L226 Difference]: Without dead ends: 242 [2021-12-21 18:19:27,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-12-21 18:19:27,989 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 333 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:27,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 255 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:19:27,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-12-21 18:19:27,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 215. [2021-12-21 18:19:27,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 184 states have (on average 1.298913043478261) internal successors, (239), 200 states have internal predecessors, (239), 6 states have call successors, (6), 5 states have call predecessors, (6), 9 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2021-12-21 18:19:27,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 256 transitions. [2021-12-21 18:19:27,992 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 256 transitions. Word has length 51 [2021-12-21 18:19:27,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:27,992 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 256 transitions. [2021-12-21 18:19:27,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:19:27,993 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 256 transitions. [2021-12-21 18:19:27,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-21 18:19:27,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:27,993 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:27,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 18:19:27,993 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:27,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:27,993 INFO L85 PathProgramCache]: Analyzing trace with hash 793594528, now seen corresponding path program 1 times [2021-12-21 18:19:27,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:27,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947260742] [2021-12-21 18:19:27,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:27,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:28,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:28,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:19:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 18:19:28,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:28,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947260742] [2021-12-21 18:19:28,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947260742] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:19:28,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:19:28,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 18:19:28,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152946870] [2021-12-21 18:19:28,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:19:28,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:19:28,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:28,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:19:28,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:19:28,057 INFO L87 Difference]: Start difference. First operand 215 states and 256 transitions. Second operand has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:19:28,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:28,230 INFO L93 Difference]: Finished difference Result 242 states and 275 transitions. [2021-12-21 18:19:28,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 18:19:28,231 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2021-12-21 18:19:28,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:28,232 INFO L225 Difference]: With dead ends: 242 [2021-12-21 18:19:28,232 INFO L226 Difference]: Without dead ends: 242 [2021-12-21 18:19:28,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-12-21 18:19:28,233 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 383 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:28,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 230 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:19:28,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-12-21 18:19:28,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 217. [2021-12-21 18:19:28,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 186 states have (on average 1.2903225806451613) internal successors, (240), 202 states have internal predecessors, (240), 6 states have call successors, (6), 5 states have call predecessors, (6), 9 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2021-12-21 18:19:28,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 257 transitions. [2021-12-21 18:19:28,237 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 257 transitions. Word has length 51 [2021-12-21 18:19:28,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:28,237 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 257 transitions. [2021-12-21 18:19:28,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:19:28,238 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 257 transitions. [2021-12-21 18:19:28,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-21 18:19:28,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:28,238 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:28,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 18:19:28,239 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:28,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:28,239 INFO L85 PathProgramCache]: Analyzing trace with hash 753850610, now seen corresponding path program 1 times [2021-12-21 18:19:28,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:28,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048900059] [2021-12-21 18:19:28,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:28,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:28,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:28,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:28,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:19:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 18:19:28,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:28,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048900059] [2021-12-21 18:19:28,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048900059] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:19:28,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698514732] [2021-12-21 18:19:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:28,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:28,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:19:28,351 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:19:28,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-21 18:19:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:28,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 18:19:28,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:19:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 18:19:28,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:19:28,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698514732] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:19:28,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:19:28,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 15 [2021-12-21 18:19:28,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18297457] [2021-12-21 18:19:28,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:19:28,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 18:19:28,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:28,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 18:19:28,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-21 18:19:28,533 INFO L87 Difference]: Start difference. First operand 217 states and 257 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:19:28,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:28,583 INFO L93 Difference]: Finished difference Result 237 states and 275 transitions. [2021-12-21 18:19:28,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:19:28,584 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2021-12-21 18:19:28,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:28,584 INFO L225 Difference]: With dead ends: 237 [2021-12-21 18:19:28,585 INFO L226 Difference]: Without dead ends: 237 [2021-12-21 18:19:28,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-12-21 18:19:28,585 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 29 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:28,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 360 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:19:28,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-12-21 18:19:28,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 215. [2021-12-21 18:19:28,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 184 states have (on average 1.2826086956521738) internal successors, (236), 201 states have internal predecessors, (236), 6 states have call successors, (6), 5 states have call predecessors, (6), 9 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2021-12-21 18:19:28,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 253 transitions. [2021-12-21 18:19:28,589 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 253 transitions. Word has length 51 [2021-12-21 18:19:28,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:28,589 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 253 transitions. [2021-12-21 18:19:28,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:19:28,589 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 253 transitions. [2021-12-21 18:19:28,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-21 18:19:28,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:28,589 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:28,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-21 18:19:28,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:28,807 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:28,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:28,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1396186650, now seen corresponding path program 1 times [2021-12-21 18:19:28,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:28,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668181284] [2021-12-21 18:19:28,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:28,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:28,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:28,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-21 18:19:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:28,862 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 18:19:28,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:28,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668181284] [2021-12-21 18:19:28,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668181284] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:19:28,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569916313] [2021-12-21 18:19:28,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:28,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:28,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:19:28,863 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:19:28,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-21 18:19:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:28,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-21 18:19:28,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:19:29,025 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 18:19:29,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:19:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 18:19:29,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569916313] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:19:29,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:19:29,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2021-12-21 18:19:29,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667986903] [2021-12-21 18:19:29,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:19:29,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 18:19:29,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:29,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 18:19:29,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-12-21 18:19:29,155 INFO L87 Difference]: Start difference. First operand 215 states and 253 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 18:19:29,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:29,303 INFO L93 Difference]: Finished difference Result 213 states and 251 transitions. [2021-12-21 18:19:29,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 18:19:29,303 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2021-12-21 18:19:29,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:29,304 INFO L225 Difference]: With dead ends: 213 [2021-12-21 18:19:29,304 INFO L226 Difference]: Without dead ends: 207 [2021-12-21 18:19:29,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-12-21 18:19:29,305 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 31 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:29,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 893 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:19:29,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-21 18:19:29,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 195. [2021-12-21 18:19:29,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 166 states have (on average 1.2771084337349397) internal successors, (212), 182 states have internal predecessors, (212), 5 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-21 18:19:29,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 225 transitions. [2021-12-21 18:19:29,308 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 225 transitions. Word has length 51 [2021-12-21 18:19:29,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:29,308 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 225 transitions. [2021-12-21 18:19:29,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 18:19:29,308 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 225 transitions. [2021-12-21 18:19:29,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-21 18:19:29,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:29,309 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:29,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-21 18:19:29,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-21 18:19:29,527 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:29,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:29,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1168374810, now seen corresponding path program 1 times [2021-12-21 18:19:29,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:29,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104774719] [2021-12-21 18:19:29,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:29,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:29,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:29,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:19:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 18:19:29,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:29,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104774719] [2021-12-21 18:19:29,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104774719] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:19:29,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316190982] [2021-12-21 18:19:29,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:29,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:29,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:19:29,613 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:19:29,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-21 18:19:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:29,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-21 18:19:29,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:19:29,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-21 18:19:29,823 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 18:19:29,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:19:29,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316190982] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:19:29,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:19:29,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 15 [2021-12-21 18:19:29,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472697736] [2021-12-21 18:19:29,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:19:29,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 18:19:29,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:29,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 18:19:29,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-12-21 18:19:29,824 INFO L87 Difference]: Start difference. First operand 195 states and 225 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:19:29,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:29,909 INFO L93 Difference]: Finished difference Result 213 states and 240 transitions. [2021-12-21 18:19:29,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 18:19:29,909 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2021-12-21 18:19:29,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:29,910 INFO L225 Difference]: With dead ends: 213 [2021-12-21 18:19:29,910 INFO L226 Difference]: Without dead ends: 213 [2021-12-21 18:19:29,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-12-21 18:19:29,910 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 74 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:29,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 518 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 22 Unchecked, 0.0s Time] [2021-12-21 18:19:29,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-12-21 18:19:29,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 195. [2021-12-21 18:19:29,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 166 states have (on average 1.2710843373493976) internal successors, (211), 182 states have internal predecessors, (211), 5 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-21 18:19:29,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 224 transitions. [2021-12-21 18:19:29,915 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 224 transitions. Word has length 52 [2021-12-21 18:19:29,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:29,915 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 224 transitions. [2021-12-21 18:19:29,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:19:29,915 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 224 transitions. [2021-12-21 18:19:29,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 18:19:29,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:29,916 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:29,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-21 18:19:30,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:30,131 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:30,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:30,132 INFO L85 PathProgramCache]: Analyzing trace with hash 162004220, now seen corresponding path program 1 times [2021-12-21 18:19:30,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:30,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72120707] [2021-12-21 18:19:30,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:30,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:30,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:30,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:19:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:30,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 18:19:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 18:19:30,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:30,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72120707] [2021-12-21 18:19:30,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72120707] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:19:30,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:19:30,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:19:30,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108186198] [2021-12-21 18:19:30,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:19:30,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:19:30,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:30,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:19:30,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:19:30,157 INFO L87 Difference]: Start difference. First operand 195 states and 224 transitions. Second operand has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 18:19:30,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:30,179 INFO L93 Difference]: Finished difference Result 209 states and 235 transitions. [2021-12-21 18:19:30,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:19:30,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2021-12-21 18:19:30,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:30,181 INFO L225 Difference]: With dead ends: 209 [2021-12-21 18:19:30,181 INFO L226 Difference]: Without dead ends: 209 [2021-12-21 18:19:30,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:19:30,181 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 43 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:30,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 135 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:19:30,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-21 18:19:30,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 194. [2021-12-21 18:19:30,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 166 states have (on average 1.2590361445783131) internal successors, (209), 181 states have internal predecessors, (209), 5 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-21 18:19:30,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 222 transitions. [2021-12-21 18:19:30,185 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 222 transitions. Word has length 54 [2021-12-21 18:19:30,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:30,185 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 222 transitions. [2021-12-21 18:19:30,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 18:19:30,185 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 222 transitions. [2021-12-21 18:19:30,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 18:19:30,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:30,186 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:30,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-21 18:19:30,186 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:30,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:30,186 INFO L85 PathProgramCache]: Analyzing trace with hash 162004221, now seen corresponding path program 1 times [2021-12-21 18:19:30,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:30,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458895500] [2021-12-21 18:19:30,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:30,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:30,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:30,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:19:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:30,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 18:19:30,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 18:19:30,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:30,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458895500] [2021-12-21 18:19:30,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458895500] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:19:30,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:19:30,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:19:30,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719913002] [2021-12-21 18:19:30,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:19:30,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:19:30,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:30,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:19:30,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:19:30,225 INFO L87 Difference]: Start difference. First operand 194 states and 222 transitions. Second operand has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 18:19:30,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:30,246 INFO L93 Difference]: Finished difference Result 210 states and 234 transitions. [2021-12-21 18:19:30,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:19:30,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2021-12-21 18:19:30,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:30,247 INFO L225 Difference]: With dead ends: 210 [2021-12-21 18:19:30,247 INFO L226 Difference]: Without dead ends: 210 [2021-12-21 18:19:30,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:19:30,247 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 45 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:30,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 140 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:19:30,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-12-21 18:19:30,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 193. [2021-12-21 18:19:30,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 166 states have (on average 1.2469879518072289) internal successors, (207), 180 states have internal predecessors, (207), 5 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-21 18:19:30,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 220 transitions. [2021-12-21 18:19:30,250 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 220 transitions. Word has length 54 [2021-12-21 18:19:30,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:30,250 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 220 transitions. [2021-12-21 18:19:30,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 18:19:30,250 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 220 transitions. [2021-12-21 18:19:30,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 18:19:30,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:30,251 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:30,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-21 18:19:30,251 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:30,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:30,251 INFO L85 PathProgramCache]: Analyzing trace with hash 162004276, now seen corresponding path program 1 times [2021-12-21 18:19:30,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:30,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051033995] [2021-12-21 18:19:30,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:30,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:30,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:30,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:19:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:30,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 18:19:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 18:19:30,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:30,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051033995] [2021-12-21 18:19:30,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051033995] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:19:30,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:19:30,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 18:19:30,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718916152] [2021-12-21 18:19:30,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:19:30,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 18:19:30,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:30,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 18:19:30,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:19:30,299 INFO L87 Difference]: Start difference. First operand 193 states and 220 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 18:19:30,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:30,342 INFO L93 Difference]: Finished difference Result 220 states and 251 transitions. [2021-12-21 18:19:30,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 18:19:30,342 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2021-12-21 18:19:30,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:30,343 INFO L225 Difference]: With dead ends: 220 [2021-12-21 18:19:30,343 INFO L226 Difference]: Without dead ends: 220 [2021-12-21 18:19:30,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:19:30,344 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 15 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:30,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 401 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:19:30,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-21 18:19:30,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 219. [2021-12-21 18:19:30,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 190 states have (on average 1.2421052631578948) internal successors, (236), 204 states have internal predecessors, (236), 5 states have call successors, (5), 5 states have call predecessors, (5), 10 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-21 18:19:30,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 251 transitions. [2021-12-21 18:19:30,347 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 251 transitions. Word has length 54 [2021-12-21 18:19:30,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:30,348 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 251 transitions. [2021-12-21 18:19:30,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 18:19:30,348 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 251 transitions. [2021-12-21 18:19:30,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-21 18:19:30,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:30,348 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:30,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-21 18:19:30,349 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:30,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:30,349 INFO L85 PathProgramCache]: Analyzing trace with hash 658181978, now seen corresponding path program 1 times [2021-12-21 18:19:30,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:30,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693840955] [2021-12-21 18:19:30,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:30,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:30,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:30,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 18:19:30,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 18:19:30,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:30,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693840955] [2021-12-21 18:19:30,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693840955] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:19:30,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441376555] [2021-12-21 18:19:30,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:30,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:30,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:19:30,516 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:19:30,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-21 18:19:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:30,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-21 18:19:30,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:19:30,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:19:30,658 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:19:30,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-21 18:19:30,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 18:19:30,770 INFO L353 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-12-21 18:19:30,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-12-21 18:19:30,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 18:19:30,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2021-12-21 18:19:31,309 INFO L353 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-12-21 18:19:31,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 27 [2021-12-21 18:19:31,428 INFO L353 Elim1Store]: treesize reduction 10, result has 69.7 percent of original size [2021-12-21 18:19:31,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 55 [2021-12-21 18:19:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:19:31,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:19:31,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:19:31,833 INFO L353 Elim1Store]: treesize reduction 23, result has 58.2 percent of original size [2021-12-21 18:19:31,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 284 treesize of output 263 [2021-12-21 18:19:35,753 INFO L353 Elim1Store]: treesize reduction 140, result has 60.2 percent of original size [2021-12-21 18:19:35,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 36 case distinctions, treesize of input 8480 treesize of output 7043 [2021-12-21 18:19:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 18:19:48,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441376555] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:19:48,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:19:48,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 17] total 43 [2021-12-21 18:19:48,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580078286] [2021-12-21 18:19:48,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:19:48,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-21 18:19:48,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:48,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-21 18:19:48,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1736, Unknown=2, NotChecked=0, Total=1892 [2021-12-21 18:19:48,526 INFO L87 Difference]: Start difference. First operand 219 states and 251 transitions. Second operand has 44 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 44 states have internal predecessors, (96), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:19:49,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:49,228 INFO L93 Difference]: Finished difference Result 247 states and 284 transitions. [2021-12-21 18:19:49,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 18:19:49,229 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 44 states have internal predecessors, (96), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 53 [2021-12-21 18:19:49,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:49,230 INFO L225 Difference]: With dead ends: 247 [2021-12-21 18:19:49,230 INFO L226 Difference]: Without dead ends: 247 [2021-12-21 18:19:49,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=384, Invalid=2694, Unknown=2, NotChecked=0, Total=3080 [2021-12-21 18:19:49,231 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 85 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1808 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 490 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:49,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1808 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 437 Invalid, 0 Unknown, 490 Unchecked, 0.2s Time] [2021-12-21 18:19:49,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-12-21 18:19:49,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 222. [2021-12-21 18:19:49,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 193 states have (on average 1.2487046632124352) internal successors, (241), 207 states have internal predecessors, (241), 5 states have call successors, (5), 5 states have call predecessors, (5), 10 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-21 18:19:49,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 256 transitions. [2021-12-21 18:19:49,234 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 256 transitions. Word has length 53 [2021-12-21 18:19:49,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:49,235 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 256 transitions. [2021-12-21 18:19:49,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 44 states have internal predecessors, (96), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:19:49,235 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 256 transitions. [2021-12-21 18:19:49,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-21 18:19:49,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:49,236 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:49,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-21 18:19:49,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-21 18:19:49,455 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:49,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:49,456 INFO L85 PathProgramCache]: Analyzing trace with hash 658181979, now seen corresponding path program 1 times [2021-12-21 18:19:49,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:49,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067387424] [2021-12-21 18:19:49,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:49,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:49,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:49,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 18:19:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 18:19:49,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:49,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067387424] [2021-12-21 18:19:49,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067387424] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:19:49,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433506655] [2021-12-21 18:19:49,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:49,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:49,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:19:49,739 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:19:49,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-21 18:19:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:49,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-21 18:19:49,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:19:49,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:19:49,933 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 18:19:49,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-21 18:19:49,951 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:19:49,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-21 18:19:50,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 18:19:50,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 18:19:50,111 INFO L353 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-21 18:19:50,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-12-21 18:19:50,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-21 18:19:50,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2021-12-21 18:19:50,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-21 18:19:51,826 INFO L353 Elim1Store]: treesize reduction 84, result has 25.7 percent of original size [2021-12-21 18:19:51,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 154 treesize of output 98 [2021-12-21 18:19:51,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:19:51,835 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-21 18:19:51,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 25 [2021-12-21 18:19:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:19:51,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:19:52,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433506655] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:19:52,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:19:52,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 36 [2021-12-21 18:19:52,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352715884] [2021-12-21 18:19:52,374 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:19:52,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-21 18:19:52,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:52,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-21 18:19:52,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1782, Unknown=0, NotChecked=0, Total=1892 [2021-12-21 18:19:52,376 INFO L87 Difference]: Start difference. First operand 222 states and 256 transitions. Second operand has 37 states, 36 states have (on average 2.138888888888889) internal successors, (77), 37 states have internal predecessors, (77), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:19:57,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:57,980 INFO L93 Difference]: Finished difference Result 327 states and 370 transitions. [2021-12-21 18:19:57,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 18:19:57,980 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.138888888888889) internal successors, (77), 37 states have internal predecessors, (77), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 53 [2021-12-21 18:19:57,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:57,981 INFO L225 Difference]: With dead ends: 327 [2021-12-21 18:19:57,981 INFO L226 Difference]: Without dead ends: 327 [2021-12-21 18:19:57,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=372, Invalid=3532, Unknown=2, NotChecked=0, Total=3906 [2021-12-21 18:19:57,983 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 545 mSDsluCounter, 1953 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 2040 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:57,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 2040 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1320 Invalid, 0 Unknown, 196 Unchecked, 0.6s Time] [2021-12-21 18:19:57,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-21 18:19:57,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 222. [2021-12-21 18:19:57,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 193 states have (on average 1.2435233160621761) internal successors, (240), 207 states have internal predecessors, (240), 5 states have call successors, (5), 5 states have call predecessors, (5), 10 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-21 18:19:57,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 255 transitions. [2021-12-21 18:19:57,987 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 255 transitions. Word has length 53 [2021-12-21 18:19:57,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:57,987 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 255 transitions. [2021-12-21 18:19:57,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.138888888888889) internal successors, (77), 37 states have internal predecessors, (77), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:19:57,988 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 255 transitions. [2021-12-21 18:19:57,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 18:19:57,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:57,988 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:58,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-21 18:19:58,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:58,202 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:58,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:58,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1820277497, now seen corresponding path program 1 times [2021-12-21 18:19:58,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:58,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528864011] [2021-12-21 18:19:58,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:58,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:58,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:58,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:19:58,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:58,274 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 18:19:58,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:58,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528864011] [2021-12-21 18:19:58,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528864011] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:19:58,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:19:58,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 18:19:58,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229913062] [2021-12-21 18:19:58,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:19:58,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:19:58,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:58,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:19:58,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:19:58,284 INFO L87 Difference]: Start difference. First operand 222 states and 255 transitions. Second operand has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:19:58,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:58,436 INFO L93 Difference]: Finished difference Result 240 states and 269 transitions. [2021-12-21 18:19:58,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 18:19:58,436 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2021-12-21 18:19:58,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:58,437 INFO L225 Difference]: With dead ends: 240 [2021-12-21 18:19:58,438 INFO L226 Difference]: Without dead ends: 240 [2021-12-21 18:19:58,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-12-21 18:19:58,438 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 349 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:58,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 254 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:19:58,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-21 18:19:58,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 223. [2021-12-21 18:19:58,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 194 states have (on average 1.2422680412371134) internal successors, (241), 208 states have internal predecessors, (241), 5 states have call successors, (5), 5 states have call predecessors, (5), 10 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-21 18:19:58,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 256 transitions. [2021-12-21 18:19:58,443 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 256 transitions. Word has length 54 [2021-12-21 18:19:58,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:58,443 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 256 transitions. [2021-12-21 18:19:58,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:19:58,443 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 256 transitions. [2021-12-21 18:19:58,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 18:19:58,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:58,446 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:58,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-21 18:19:58,446 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:58,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:58,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1067235197, now seen corresponding path program 1 times [2021-12-21 18:19:58,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:58,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173035027] [2021-12-21 18:19:58,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:58,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:58,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:58,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:19:58,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:58,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 18:19:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:58,475 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 18:19:58,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:58,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173035027] [2021-12-21 18:19:58,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173035027] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:19:58,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:19:58,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:19:58,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751910077] [2021-12-21 18:19:58,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:19:58,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:19:58,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:58,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:19:58,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:19:58,476 INFO L87 Difference]: Start difference. First operand 223 states and 256 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 18:19:58,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:19:58,484 INFO L93 Difference]: Finished difference Result 263 states and 302 transitions. [2021-12-21 18:19:58,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:19:58,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 56 [2021-12-21 18:19:58,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:19:58,485 INFO L225 Difference]: With dead ends: 263 [2021-12-21 18:19:58,485 INFO L226 Difference]: Without dead ends: 263 [2021-12-21 18:19:58,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:19:58,487 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 35 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:19:58,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 176 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:19:58,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-12-21 18:19:58,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 231. [2021-12-21 18:19:58,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 202 states have (on average 1.2425742574257426) internal successors, (251), 216 states have internal predecessors, (251), 5 states have call successors, (5), 5 states have call predecessors, (5), 10 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-21 18:19:58,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 266 transitions. [2021-12-21 18:19:58,492 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 266 transitions. Word has length 56 [2021-12-21 18:19:58,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:19:58,492 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 266 transitions. [2021-12-21 18:19:58,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 18:19:58,492 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 266 transitions. [2021-12-21 18:19:58,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 18:19:58,494 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:19:58,494 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:19:58,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-21 18:19:58,494 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:19:58,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:19:58,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1215436308, now seen corresponding path program 2 times [2021-12-21 18:19:58,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:19:58,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093919101] [2021-12-21 18:19:58,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:19:58,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:19:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:58,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:19:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:58,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:19:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:58,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 18:19:58,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:19:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 18:19:58,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:19:58,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093919101] [2021-12-21 18:19:58,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093919101] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:19:58,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455812586] [2021-12-21 18:19:58,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:19:58,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:19:58,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:19:58,610 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:19:58,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-21 18:19:58,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:19:58,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:19:58,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-21 18:19:58,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:19:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 18:19:58,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:19:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 18:19:59,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455812586] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:19:59,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:19:59,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 30 [2021-12-21 18:19:59,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603194117] [2021-12-21 18:19:59,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:19:59,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-21 18:19:59,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:19:59,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-21 18:19:59,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2021-12-21 18:19:59,226 INFO L87 Difference]: Start difference. First operand 231 states and 266 transitions. Second operand has 30 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 27 states have internal predecessors, (94), 6 states have call successors, (6), 1 states have call predecessors, (6), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-21 18:20:00,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:20:00,631 INFO L93 Difference]: Finished difference Result 501 states and 590 transitions. [2021-12-21 18:20:00,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-21 18:20:00,632 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 27 states have internal predecessors, (94), 6 states have call successors, (6), 1 states have call predecessors, (6), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 57 [2021-12-21 18:20:00,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:20:00,637 INFO L225 Difference]: With dead ends: 501 [2021-12-21 18:20:00,637 INFO L226 Difference]: Without dead ends: 501 [2021-12-21 18:20:00,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=524, Invalid=3766, Unknown=0, NotChecked=0, Total=4290 [2021-12-21 18:20:00,638 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 588 mSDsluCounter, 1751 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:20:00,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [599 Valid, 1845 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 18:20:00,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-12-21 18:20:00,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 241. [2021-12-21 18:20:00,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 210 states have (on average 1.2476190476190476) internal successors, (262), 225 states have internal predecessors, (262), 6 states have call successors, (6), 5 states have call predecessors, (6), 11 states have return successors, (13), 10 states have call predecessors, (13), 6 states have call successors, (13) [2021-12-21 18:20:00,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 281 transitions. [2021-12-21 18:20:00,668 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 281 transitions. Word has length 57 [2021-12-21 18:20:00,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:20:00,668 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 281 transitions. [2021-12-21 18:20:00,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 27 states have internal predecessors, (94), 6 states have call successors, (6), 1 states have call predecessors, (6), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-21 18:20:00,669 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 281 transitions. [2021-12-21 18:20:00,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 18:20:00,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:20:00,670 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:20:00,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-21 18:20:00,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-21 18:20:00,883 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:20:00,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:20:00,884 INFO L85 PathProgramCache]: Analyzing trace with hash 628630294, now seen corresponding path program 3 times [2021-12-21 18:20:00,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:20:00,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660486419] [2021-12-21 18:20:00,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:00,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:20:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:00,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:20:00,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:00,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:20:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:00,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 18:20:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-21 18:20:00,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:20:00,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660486419] [2021-12-21 18:20:00,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660486419] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:20:00,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:20:00,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 18:20:00,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678616241] [2021-12-21 18:20:00,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:20:00,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 18:20:00,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:20:00,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 18:20:00,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:20:00,991 INFO L87 Difference]: Start difference. First operand 241 states and 281 transitions. Second operand has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 10 states have internal predecessors, (34), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:20:01,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:20:01,336 INFO L93 Difference]: Finished difference Result 306 states and 347 transitions. [2021-12-21 18:20:01,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 18:20:01,337 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 10 states have internal predecessors, (34), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2021-12-21 18:20:01,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:20:01,338 INFO L225 Difference]: With dead ends: 306 [2021-12-21 18:20:01,338 INFO L226 Difference]: Without dead ends: 306 [2021-12-21 18:20:01,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-12-21 18:20:01,339 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 571 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:20:01,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 381 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:20:01,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-12-21 18:20:01,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 242. [2021-12-21 18:20:01,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 211 states have (on average 1.2511848341232228) internal successors, (264), 226 states have internal predecessors, (264), 6 states have call successors, (6), 5 states have call predecessors, (6), 11 states have return successors, (13), 10 states have call predecessors, (13), 6 states have call successors, (13) [2021-12-21 18:20:01,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 283 transitions. [2021-12-21 18:20:01,343 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 283 transitions. Word has length 57 [2021-12-21 18:20:01,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:20:01,343 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 283 transitions. [2021-12-21 18:20:01,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 10 states have internal predecessors, (34), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:20:01,344 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 283 transitions. [2021-12-21 18:20:01,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 18:20:01,344 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:20:01,344 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:20:01,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-21 18:20:01,345 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:20:01,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:20:01,345 INFO L85 PathProgramCache]: Analyzing trace with hash 628630293, now seen corresponding path program 1 times [2021-12-21 18:20:01,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:20:01,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035385398] [2021-12-21 18:20:01,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:01,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:20:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:01,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:20:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:01,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 18:20:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:01,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 18:20:01,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-21 18:20:01,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:20:01,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035385398] [2021-12-21 18:20:01,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035385398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:20:01,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:20:01,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 18:20:01,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224830533] [2021-12-21 18:20:01,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:20:01,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 18:20:01,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:20:01,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 18:20:01,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-21 18:20:01,418 INFO L87 Difference]: Start difference. First operand 242 states and 283 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:20:01,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:20:01,613 INFO L93 Difference]: Finished difference Result 291 states and 332 transitions. [2021-12-21 18:20:01,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 18:20:01,613 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2021-12-21 18:20:01,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:20:01,614 INFO L225 Difference]: With dead ends: 291 [2021-12-21 18:20:01,615 INFO L226 Difference]: Without dead ends: 291 [2021-12-21 18:20:01,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-12-21 18:20:01,615 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 433 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:20:01,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 382 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:20:01,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-12-21 18:20:01,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 242. [2021-12-21 18:20:01,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 211 states have (on average 1.2464454976303319) internal successors, (263), 226 states have internal predecessors, (263), 6 states have call successors, (6), 5 states have call predecessors, (6), 11 states have return successors, (13), 10 states have call predecessors, (13), 6 states have call successors, (13) [2021-12-21 18:20:01,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 282 transitions. [2021-12-21 18:20:01,621 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 282 transitions. Word has length 57 [2021-12-21 18:20:01,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:20:01,621 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 282 transitions. [2021-12-21 18:20:01,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:20:01,621 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 282 transitions. [2021-12-21 18:20:01,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 18:20:01,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:20:01,624 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:20:01,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-21 18:20:01,624 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-21 18:20:01,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:20:01,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1372073195, now seen corresponding path program 2 times [2021-12-21 18:20:01,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:20:01,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217642905] [2021-12-21 18:20:01,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:20:01,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:20:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:01,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 18:20:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:01,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 18:20:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:20:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 18:20:01,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:20:01,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217642905] [2021-12-21 18:20:01,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217642905] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:20:01,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410186717] [2021-12-21 18:20:01,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:20:01,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:20:01,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:20:01,814 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 18:20:01,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-21 18:20:01,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:20:01,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:20:01,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-21 18:20:01,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:20:01,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:20:01,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 18:20:02,028 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:20:02,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 18:20:02,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2021-12-21 18:20:02,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 18:20:02,459 INFO L353 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-12-21 18:20:02,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 27 [2021-12-21 18:20:02,545 INFO L353 Elim1Store]: treesize reduction 11, result has 66.7 percent of original size [2021-12-21 18:20:02,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 39 [2021-12-21 18:20:02,564 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:20:02,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:20:02,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:20:02,739 INFO L353 Elim1Store]: treesize reduction 23, result has 58.2 percent of original size [2021-12-21 18:20:02,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 331 treesize of output 310 [2021-12-21 18:20:03,814 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.offset| Int) (|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (let ((.cse2 (select (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|))) (or (let ((.cse1 (select .cse0 .cse2))) (and (or (not (= (select (select .cse0 (select .cse1 |c_ULTIMATE.start_sll_create_~new_head~0#1.offset|)) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0)) (and (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.base| |ULTIMATE.start_main_~#s~0#1.base|))) (or (not (= (select (select .cse0 (select .cse1 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0)) (not (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| |c_ULTIMATE.start_sll_create_~head~0#1.offset|))))) (not (= |c_ULTIMATE.start_sll_create_~new_head~0#1.base| .cse2)))))) is different from false [2021-12-21 18:20:04,969 INFO L353 Elim1Store]: treesize reduction 242, result has 61.3 percent of original size [2021-12-21 18:20:04,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 18 new quantified variables, introduced 66 case distinctions, treesize of input 12960 treesize of output 11094